> ## Documentation Index
> Fetch the complete documentation index at: https://arizeai-433a7140.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# LangChain

> LangChain is an open-source framework for building language model applications with prompt chaining, memory, and external integrations

<Card title="LangChain" href="https://www.langchain.com/" icon="globe" horizontal>
  [](https://www.langchain.com/)
</Card>

<Columns cols={2}>
  <Card img="https://storage.googleapis.com/arize-phoenix-assets/assets/images/phoenix-docs-images/f1e5c9e9-image.avif" horizontal title="LangChain Tracing" href="/docs/phoenix/integrations/python/langchain/langchain-tracing" />
</Columns>